Machine for sewing looped fabrics.



' 1,205,108.' .-Patentemvg14; 1916.

E. E. RANDALL. MACHNE FOR SEWING LQOIE'D FABRICS.

.APPucATloN msu Nov. la. 1ers.

Figi;

narran srarns EDISN E. "RANDALL, OF KANKAKEE, I-LLINGIS, ASSIGNGR T PAB/AMOUNT KNI'ITNG contrarre,

F CHICAGO, ILLINOIS, CRPORATION OF ILLNOIS.

MACHINE FOR .SEWING ILPED FBB/KCS.

Lacasse.

Specification of Letters Patent.

remates nevica, reis.,

uniting or sewing together the edges` ofkmt goods or looped fabrics and as herein' illustrated is particularly designed for sewing together edges or" such articles as stockings, as when the stocking is knit oh a circular knitting machine beginning at t-he toe and the edges at the toe have. to be united to complete the stockintf. Machines of this known. rlh'ey comprise a bed or support, a stitch forming mechanism tixed With relation to the bed or Support, and a movable Work Supporting )member carrying a series of projecting impaling pins `which move Withjthe support past the stitch forming mechanism. In the form illustrated as a preferred embodiment of the invention this machine comprises a circular support or base, a rotating work supporting ring carrying a circular series of radially projecting inrpaling pins and a stitch forming mechanism, the instrumentalities of which operate over'each impaling pin as it comes opposite the stitch forming mechanism. The edges of the knitted-or looped fabric to be united have their meshes superimposed and placed on the impaling pins so that the needle passes therethrough and the stitching unites 'the fabrics. rlhese machines employ stitch forming mechanisms handling either one or tivo-threads and the more recent and imi' provedtype of machine handles tivo threads making what is known as a tivo-thread lock Stitch.-

n I'One object of the invention is to provide a signal preferably of an audible character for indicating to the operative of the machine When a thread breaks or fails so that the machine may be stopped and the thread replaced. lf a thread breaks or fails during the sewing operation and is unnoticed byA general type and of various forms are Well,

the operative then the stitch forming instrumentalities will continue their operations butvplacing no stitches in the fabrics, and the fabrics will be removed from the impaling pins without being united and usually Without the operative being aware or" that fact. Before the fabrics pass to the stitch forming mechanism the edges projecting above the impaling pins are 4trimmed '0E close to the impaling pins by a suitable mechanism so that when the fabrics are Stitched together there will be no more material projecting beyond the stitched portion than is necessary for strength. Any fabrics, therefore, Which are removed from the impaling pins Without being vstitched would nevertheless be trimmed ott vby the trimming mechanism and be in such a condition that they could not be replaced upon the impaling pins and again run past the stitch forming mechanism.. `This is because the fabrics are of such a character' that if again replaced upon the impaling pins a considerable amcunt'must be left projecting above the impaling pins and aga-in trim-med oil? by trimming mechanism, which would alter the character of the articles and at best cause them to be condemned as .""secondsf7 These conditions have rendered vit'not feasible to provide such a machine with means for automatically removing the Work from the' impaling pins after the fabrics have been stitched together because such mechanism Would operate to remove all the Work Which comes Within its'tield of action Whether the :fabrics had been stitched together or not.

Another object of the invention is therefore to proiff'ide a combination in such a machine of trimmingmechanism to trim oli' the edgesprojecting above the impaling pins, stitch forming mechanism to unite the edges; signa] to indicate the breakage or y'failure of a thread, and means for automatically removing the work from the impaling pins., Such a combination is now feasible and increases the eiiiciency and value ot such a machirna.v lit thread breaks or fails the .siena-lat once indicates? that tact to the operative and the machine 1s 'stopped before the automatic mechanism operates to vremove the Work the iinclaims.

circuler bed or support l.,

'paling pins. Thus no yvoilr. is lost orf reA duced to 'the jcondition of seconds;'

- v"lliese end other objectsfof the invention will more' fully. .appear 'from thev` eccomi peiiying description end drawings und will bepsrticiilerly pointed out in the appended 'ln thedrewings, Figure .l is :i tcp plain. v u i l n a view .o -sn. ordiiiery type of machine tor sewing looped ebricsiii which the impeling pins'ei'e arranged in e, circuler series,-

Wliich thestitcli. rorming mechanism is o the t'Wothread. tyoe sind in which. are embodied preferred forms of thel present invention; llic 2 isn' side elevation oli-e' sig-nel and its immediate operating mechemsm embodying e; preferred .iiorin oi the inifeiition. for indicating the 'brezilrugef or eilure of either of the threads; Fig-.3 is'eJ View chieily 'iii'L yerticel'rediel cross section of e ineens for' automatically removing the `Wer-lr fromthe inipeling pins andthe iinn medizitely associated parte or the machine.

'ltis unnecessary to describ'e'iu details' -mechine for sewing looped vl'ebrics oitthe Vtype herein illustrated so ier asits general features are' concerned because it is of 'well known clisracter. lt yis' shown les compris.`

ing the stenderdor base l from which rises and projects forwardly the overhanging erm 2. A .verticzilstud 3 et the outer end of' the overhanging arm Q'cerries fixed thereon the v'The .rotary iin# paling .pin support 5 is mounted to rotate on this bed and carries TheY worl; to be united suoli us the. two knitted portions of lthe stocking is placed on the impolingj pins with the i'iieshes of vthe Ativo parts superimposed and preferably one iii'esli being placed on pin. "llieoperej vtive sits et the front oi the mecliineplecing the Work upon the pins es it comes in. front olf the operative and the uorlr Fig. l.

rllie mainshaft' 7 of the machine is supported in suiteble bearings inthe standard .l and. from it are operated tlie'i'erious instrumeiitelities of tlievmiich-iiie, 'A pewl 8 operated by the' mein shaft serres through Y vsuitebhz mechanism to rotate ltli-e impeling pin support.

-llrimning mechanism of Well known type .is illustrated :it 9 and comprises e, pair of scissoi-lil2;e blades operating; in a horizontal plane and close above the impaliiig' pins.

rlhese' blades may be operated from :i suitable eccentric'lO on the main shaft. is the .work iiiipaled on the pins travels in the di rection of the arrow-the edges projecting above the inipziling pins are sheared o'f by tliis trimming mechanism leaving only that einountprojecting which is sullicient tov re' et its periphery. secured thereto eiid'riidielly projecting therefrom the circuler, series ci impeling pins 6.

so placed. travels in -tlie direction of thel arrow in teenies ceive and hold the line of stitching und secure 'e union olf thetebricsfof proper strength; Y.

Stitch forming .inchiiism is valso mountedv 1.

oii the standard l end' operated from the mein shsfhf'rllie details of this mechanism are unimportant to the present invention `und 'it may be of'eny usuel or desired type. As illustrated it is oi theY tuothrea'd type,'th:it is, it comprises instrumentalities such as the .needle ll' .und loop'er or second needle, 12; 'cach of' which handles and menipuites e seperate thread'which are passed' through the Work oriiiterlooped in such e'manner v:is tolsecure e tWo-tlireiid'stitcli in' and unite the edges 'oi" the fabrics projecting-,above the impziling pins.y `l`hel threads 1.3 .sind lll pass from their respective supplies. 'over suitable tensin devices l5 and 16 respectively over suitable spring te :e up arms 17 and 1S re'- spectiyely to, the 'needle sind .loopen respectively.'

'lh-eworl; after being .trimmed passes on tlieg-iinpsling plus to the stitch forming' mechanism und thee .ges .are united there-'v by with e suitable line of stitching. lf dur-- ing'I the stitching .operation either'or both of the threads bre-:ih or toil the stitching is or both ol' the threads or the' stitch lorm-- ing mechiiiiism; 'l`his'sigiiul'- may telic ru'- rious :forms Within the broad scope of this' invention sind. muy indie-:ite in any suitiible mnner.'` Asa preferred :form oi' the invention an audible signal lierein'illustrzited :is y:i bell 19 is shown. This bell 'with its operating ineclia'nism-: muy conveniently be lmounted upoiie bracket .2 0 u'liiclibracket may besc'acuredl to the base of the machine es .by being mounted :it one end upon tlie'stud 2l `and having :i 'lug 22 :it its forward end resting on the orerliaiiging erin The stu-d Zli'iieybe any suitable part ot' the iiinchine' and is herein 4shown :is :i stud in which guides lor the threads are formed. The

. bracket 20 which is shown in side elevation in Fig; 2 has secured to it at its'lorward end by the set screw 23 the bell lf). rlie bell may be operated by n suitable striker 24.-

sliojwii as attached to :i rocker piroted to the bracket at Qll. lispriiig t?? attached :it j

its upper end to the bracket and' :it its lowerc iid to thestriler :iets to throw the striker toward the bell.' The striker isswiing away from the bell in tiny' suitable manner by 4some moving part of the machine and for "finance I that. purpose an adjustable wiper 28.

'feeding pawl 8.

. for that purpose maybe mounted onl thestud 21. The rocker 25 is sheuld'ered at 31 and the latch isof such a length that when it. rests upon the top of the shoulder the striker 24 is out of contact` with the bell, but when it is swung forwardly away from thev stop 32. on the bracket the vshoulder 31 bell and thus make an'audible sound;

will ride up behind the, latch and allow thespring v27 to throw the striker 24 against` the In this form of the invention the latch is normally in the position shown in. Fig. 2

i with the striker out of reach of the' bell and upon the breakage orv failure of either thread the latch is swung forwardly to allow the striker to sound Lthe bell. This operation of -the'latch may vbe secured in. any suitable` manner but as herein illustrated is secured .by providing the latch with a controller4 fmember shownvas a transverse arm 33 projecting therefrom and. extending directly' over the take up springs 17 and 18.. l[f the machine was of such a type as not to have the-take up springs then some other instru-4 mentality operated upon the failure or breakage of the thread would be made use Vby from the impaling' pins.

' of. The operation of this device 'is now 'apparent. If a thread running. over a take up arm` breaks that take up' arm 'will spring upwardly striking vthe lrod 33 rocking the latch forwardly from' off the shoulder 31 and causing the striker 24 tol Sound the bell.-v

Thus if veither thread breaks the bell is sounded and the operatives attention diis only involved in this invention in its combination with the `trimming rnechan1sm, stitch forming mechanism and slgnal 1t may take various forms. A simple and preferred yform is shown as a curved metal plate 36 having its outward end beveled at 37 with the beveled end extending from the base past the outer end of the path of the impaling pins so that as the work. comes against the beveled edge it will be pushed off thereshown as held in pla-'ce by a set screw 3S on 'a.friction'brake 39 suchls is'commonly employed in machines of this 'type and held in This plate is swung between the plate 36 ang-...jtm l brake 39 elevates the beveled the path of the work vso as to prevent thev v work from being removed from the impaling pins. This is a convenient means fori the operative to actuate when the signal sounds and thus insure the prevention of therel' moval of the work.

. Having fully described my invention,

what I claim as new and desire to secure by Letters Patent is:

1. A machine for 'sewing-looped fabrics.

:comprising a movable support with impaling pins thereon, trimming mechanism for trimming the edges of the impaled fabrics above the impaling pins, stitch forming mechanism for uniting said edges, means for .automatically removing the fabrics from the impaling pins after they have been carried thereby past the stitch forming mechanism, and means for lindicating the failure of thread. in the stitch forming mechanism whereby the operative is. enabled to prevent the removal of trimmed but unstitched fabrics from the impaling pins.

-2. A machine for sewing looped fabrics comprising a movable support with impaling pins thereon, trimming mechanism for trimming the edges of the impaled fabrics A above the impaling pins, a two thread stitch have been carried thereby 4past the stitch forming mechanism, a signal, and means for causing the operation of the signal upon the failure of a thread, whereby the operative is enabled to revent the removal of trimmed but unstitc `ed fabrics from the impalingpins.

3. A sewing machine comprising a two thread stltch forming mechamsm, a' bellga.

striker, means for operating the latch for restraining the operatin=o the said means, and means for releasing t'hj latch upon the failure of eitheif'thr'ead whereby the bellis sounded to indicate the failure of either thread to the operative. 4. A sewing machine comprisingva two thread stitch forming mechanism, a' pair of spring take ups one for each of said threads` a signal, a latch for preventing the operation of the signal, acontroller member for lsaid latch operated by either take up upon the failure of its thread,to release the latch and cause theoperation of the signal;

5. A sewing machine comprising a twothread stitchforming mechanism. a pair of spring take ups one for each of said threads,

a signal, a latch for preventing the operation of the signal, a controller member for 'failure of im @hemd t@ .rebase aeh and' f* cause @he ogemiom signal.

`forming f meemnm, e, spying take up n failure @f the thread to release @filme sgmall eemtroler member for said latchfopem/ed by the vtake up 'upon the Y the latch w and cause the Vopeisln'mun' of the mame *to this specictiom 

